Trigger 3D inserts to mount LEKI's closed gate guards onto Trigger 3D poles. All current gate guards come with inserts for both Trigger S and Trigger 3D but if you have a pair of existing LEKI gate guards with Trigger S inserts only, these Trigger 3D inserts will allow you to use your existing closed gate guards with the new Trigger 3D Poles. Sold as a pair.